diff --git a/docs/METHODS_EXTRINSICS.md b/docs/METHODS_EXTRINSICS.md
index 73e7bc9ac7..801efb575b 100644
--- a/docs/METHODS_EXTRINSICS.md
+++ b/docs/METHODS_EXTRINSICS.md
@@ -84,6 +84,9 @@ ___
 ▸ **putCode**(gas_limit: `Compact<Gas>`, code: `Bytes`)
 - **summary**:   Stores the given binary Wasm code into the chain's storage and returns its `codehash`.  You can instantiate contracts only with stored code.
 
+▸ **restoreTo**(dest: `AccountId`, code_hash: `CodeHash`, rent_allowance: `BalanceOf`, delta: `Vec<ContractStorageKey>`)
+- **summary**:   Allows a contract to restore a tombstone by giving its storage.   The contract that wants to restore (i.e. origin of the call, or `msg.sender` in Solidity terms) will compute a  tombstone with its storage and the given code_hash. If the computed tombstone  match the destination one, the destination contract is restored with the rent_allowance` specified,  while the origin sends all its funds to the destination and is removed.
+
 ▸ **updateSchedule**(schedule: `Schedule`)
 - **summary**:   Updates the schedule for metering contracts.   The schedule must have a greater version than the stored schedule.
 
diff --git a/docs/METHODS_STORAGE.md b/docs/METHODS_STORAGE.md
index 502e28c212..490d52c308 100644
--- a/docs/METHODS_STORAGE.md
+++ b/docs/METHODS_STORAGE.md
@@ -129,7 +129,7 @@ ___
 ▸ **signedClaimHandicap**(): `BlockNumber`
 - **summary**:   Number of block delay an extrinsic claim surcharge has.   When claim surchage is called by an extrinsic the rent is checked  for current_block - delay
 
-▸ **storageSizeOffset**(): `u64`
+▸ **storageSizeOffset**(): `u32`
 - **summary**:   Size of a contract at the time of creation. This is a simple way to ensure  that empty contracts eventually gets deleted.
 
 ▸ **surchargeReward**(): `BalanceOf`
diff --git a/lerna.json b/lerna.json
index 8d0f8bb883..e62062cfe7 100644
--- a/lerna.json
+++ b/lerna.json
@@ -9,5 +9,5 @@
   "packages": [
     "packages/*"
   ],
-  "version": "0.80.0-beta.11"
+  "version": "0.80.0-beta.12"
 }
diff --git a/package.json b/package.json
index 8e7b425e3d..9627a3d4a9 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.80.0-beta.11",
+  "version": "0.80.0-beta.12",
   "private": true,
   "engines": {
     "yarn": "^1.10.1"
diff --git a/packages/api-derive/package.json b/packages/api-derive/package.json
index d6aeaaf33b..afe39e6d6f 100644
--- a/packages/api-derive/package.json
+++ b/packages/api-derive/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api-derive",
-  "version": "0.80.0-beta.11",
+  "version": "0.80.0-beta.12",
   "description": "Common functions used across Polkadot, derived from RPC calls and storage queries.",
   "main": "index.js",
   "keywords": [
@@ -28,8 +28,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api-derive#readme",
   "dependencies": {
     "@babel/runtime": "^7.4.5",
-    "@polkadot/api": "^0.80.0-beta.11",
-    "@polkadot/types": "^0.80.0-beta.11",
+    "@polkadot/api": "^0.80.0-beta.12",
+    "@polkadot/types": "^0.80.0-beta.12",
     "@types/memoizee": "^0.4.2",
     "memoizee": "^0.4.14"
   }
diff --git a/packages/api/package.json b/packages/api/package.json
index 8b39ad65f5..10537a4a28 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/api",
-  "version": "0.80.0-beta.11",
+  "version": "0.80.0-beta.12",
   "description": "Promise and RxJS wrappers around the Polkadot JS RPC",
   "main": "index.js",
   "keywords": [
@@ -27,12 +27,12 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/api#readme",
   "dependencies": {
     "@babel/runtime": "^7.4.5",
-    "@polkadot/api-derive": "^0.80.0-beta.11",
-    "@polkadot/extrinsics": "^0.80.0-beta.11",
-    "@polkadot/rpc-provider": "^0.80.0-beta.11",
-    "@polkadot/rpc-rx": "^0.80.0-beta.11",
-    "@polkadot/storage": "^0.80.0-beta.11",
-    "@polkadot/types": "^0.80.0-beta.11",
+    "@polkadot/api-derive": "^0.80.0-beta.12",
+    "@polkadot/extrinsics": "^0.80.0-beta.12",
+    "@polkadot/rpc-provider": "^0.80.0-beta.12",
+    "@polkadot/rpc-rx": "^0.80.0-beta.12",
+    "@polkadot/storage": "^0.80.0-beta.12",
+    "@polkadot/types": "^0.80.0-beta.12",
     "@polkadot/util-crypto": "^0.92.0-beta.1"
   }
 }
diff --git a/packages/rpc-core/package.json b/packages/rpc-core/package.json
index 6e85032ea6..2d4d344d72 100644
--- a/packages/rpc-core/package.json
+++ b/packages/rpc-core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-core",
-  "version": "0.80.0-beta.11",
+  "version": "0.80.0-beta.12",
   "description": "A JavaScript wrapper for the Polkadot JsonRPC interface",
   "main": "index.js",
   "keywords": [
@@ -27,9 +27,9 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-core#readme",
   "dependencies": {
     "@babel/runtime": "^7.4.5",
-    "@polkadot/jsonrpc": "^0.80.0-beta.11",
-    "@polkadot/rpc-provider": "^0.80.0-beta.11",
-    "@polkadot/types": "^0.80.0-beta.11",
+    "@polkadot/jsonrpc": "^0.80.0-beta.12",
+    "@polkadot/rpc-provider": "^0.80.0-beta.12",
+    "@polkadot/types": "^0.80.0-beta.12",
     "@polkadot/util": "^0.92.0-beta.1"
   }
 }
diff --git a/packages/rpc-provider/package.json b/packages/rpc-provider/package.json
index 2d5a317e80..002ec77658 100644
--- a/packages/rpc-provider/package.json
+++ b/packages/rpc-provider/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-provider",
-  "version": "0.80.0-beta.11",
+  "version": "0.80.0-beta.12",
   "description": "Transport providers for the API",
   "main": "index.js",
   "keywords": [
@@ -28,7 +28,7 @@
   "dependencies": {
     "@babel/runtime": "^7.4.5",
     "@polkadot/keyring": "^0.92.0-beta.1",
-    "@polkadot/storage": "^0.80.0-beta.11",
+    "@polkadot/storage": "^0.80.0-beta.12",
     "@polkadot/util": "^0.92.0-beta.1",
     "@polkadot/util-crypto": "^0.92.0-beta.1",
     "@types/nock": "^10.0.3",
diff --git a/packages/rpc-rx/package.json b/packages/rpc-rx/package.json
index dca1d805e0..c54325f7cd 100644
--- a/packages/rpc-rx/package.json
+++ b/packages/rpc-rx/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/rpc-rx",
-  "version": "0.80.0-beta.11",
+  "version": "0.80.0-beta.12",
   "description": "An RxJs wrapper around the Polkadot JS API",
   "main": "index.js",
   "keywords": [
@@ -27,8 +27,8 @@
   "homepage": "https://github.com/polkadot-js/api/tree/master/packages/rpc-rx#readme",
   "dependencies": {
     "@babel/runtime": "^7.4.5",
-    "@polkadot/rpc-core": "^0.80.0-beta.11",
-    "@polkadot/rpc-provider": "^0.80.0-beta.11",
+    "@polkadot/rpc-core": "^0.80.0-beta.12",
+    "@polkadot/rpc-provider": "^0.80.0-beta.12",
     "@types/memoizee": "^0.4.2",
     "@types/rx": "^4.1.1",
     "memoizee": "^0.4.14",
diff --git a/packages/type-extrinsics/package.json b/packages/type-extrinsics/package.json
index 4c282b8803..1d9a3a889a 100644
--- a/packages/type-extrinsics/package.json
+++ b/packages/type-extrinsics/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/extrinsics",
-  "version": "0.80.0-beta.11",
+  "version": "0.80.0-beta.12",
   "main": "index.js",
   "repository": "https://github.com/polkadot-js/api.git",
   "author": "Jaco Greeff <jacogr@gmail.com>",
@@ -11,7 +11,7 @@
   "license": "Apache-2.0",
   "dependencies": {
     "@babel/runtime": "^7.4.5",
-    "@polkadot/types": "^0.80.0-beta.11",
+    "@polkadot/types": "^0.80.0-beta.12",
     "@polkadot/util": "^0.92.0-beta.1"
   }
 }
diff --git a/packages/type-jsonrpc/package.json b/packages/type-jsonrpc/package.json
index 5da1701212..efb238a4b3 100644
--- a/packages/type-jsonrpc/package.json
+++ b/packages/type-jsonrpc/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/jsonrpc",
-  "version": "0.80.0-beta.11",
+  "version": "0.80.0-beta.12",
   "description": "Method definitions for the Polkadot RPC layer",
   "main": "index.js",
   "publishConfig": {
diff --git a/packages/type-storage/package.json b/packages/type-storage/package.json
index b61271f40f..9630b3d3fe 100644
--- a/packages/type-storage/package.json
+++ b/packages/type-storage/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/storage",
-  "version": "0.80.0-beta.11",
+  "version": "0.80.0-beta.12",
   "description": "Generic wrapper wrapper around state storage",
   "main": "index.js",
   "publishConfig": {
@@ -28,7 +28,7 @@
   "dependencies": {
     "@babel/runtime": "^7.4.5",
     "@polkadot/keyring": "^0.92.0-beta.1",
-    "@polkadot/types": "^0.80.0-beta.11",
+    "@polkadot/types": "^0.80.0-beta.12",
     "@polkadot/util": "^0.92.0-beta.1",
     "@polkadot/util-crypto": "^0.92.0-beta.1"
   }
diff --git a/packages/types/package.json b/packages/types/package.json
index c5dc3be9a6..7362c6537d 100644
--- a/packages/types/package.json
+++ b/packages/types/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@polkadot/types",
-  "version": "0.80.0-beta.11",
+  "version": "0.80.0-beta.12",
   "description": "Implementation of the Parity codec",
   "main": "index.js",
   "keywords": [